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Customer Service

  • Monday to Friday: 8am - 6pm EST
  • Saturday/Sunday: Closed


  • Monday to Saturday: 8am - midnight EST
  • Sunday: 9am - 10pm EST

Curt TriFlex Trailer Brake Controller 51140

Product Information
List Price:
Our Price:
Part #:
Inertia activated
  • Features triple-axis motion sensing for high response & smooth stops
  • Leveling & calibration done automatically
  • Will automatically adjust brake output
  • Operates 2-8 brakes (1-4 axle trailers)
  • Mounting hardware included


  • Four models to choose from
  • Durably constructed to last
  • Timed brake controllers may be mounted in any position
  • Inertia controllers are self-leveling and may be mounted up to 70°
  • Compatible with anti-lock brakes & cruise control
  • Backed by a lifetime warranty

With the Curt trailer brake controller, you get a product that is made to fit your individual trailer braking needs. Applications range from single axle snowmobile or utility trailers to the large quad axle car haulers. In addition, all models work with anti-lock brake systems and cruise control. Curt always manufactures their products to last. With these brake controllers, you better to believe they will last you the long haul. With different types to choose from you can pick the controller that best suits your needs. A timed controller works based upon the slowness of the vehicle. Once pressure is applied to the brake the sensors will kick in and apply a more equal breaking. With an inertia based controller it will use a pendulum sensor to sense deceleration and apply the brake.

The Curt brake controller come complete with mounting hardware and easy to follow step-by-step instructions that make installation a breeze. These controllers are the most user-friendly trailer brake on the market, giving you the right trailer brake no matter what your needs may be. Be able to feel safe while doing any tow job! You should own one today!

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Limited Lifetime Warranty

CURT Manufacturing Incorporated warrants, to the original purchaser, its products to be free from defect workmanship under normal use and service, ordinary wear and tear excepted for as long as product is owned by the original purchaser.

Limitations of the Warranty
CURT Manufacturing Incorporated's obligation under this warranty is limited to repair or replacement, at its option. CURT Manufacturing Incorporated shall not be liable for the loss of or use of vehicles, cost of removal and /or installation, loss of time, inconvenience, rental of vehicles, loss or damage to personal property, expenses such as telephone, lodging, gasoline, towing, or any incidental or consequential damages. CURT Manufacturing Incorporated will examine the returned product. If the defect is covered under the warranty, CURT Manufacturing will repair the item or replace it at that time. Alterations or misuse of the items will not be covered under the warranty.   Some states do not allow the exclusion or limitation of incidental or consequential damages. So the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights and you may also have other rights, which vary, from state to state.


The Curt trailer brake controllers are an easy at home installation. For additional information give our friendly customer service a call at 877-216-5446 or 701-253-5906.

PDF Icon Curt Hitch 51140 Installation Instructions